using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.GM;
using Org.BouncyCastle.Asn1.X9;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Digests;
using Org.BouncyCastle.Crypto.Engines;
using Org.BouncyCastle.Crypto.Generators;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Utilities;
using Org.BouncyCastle.Utilities.Encoders;
using Org.BouncyCastle.X509;
using System;
using System.Collections.Generic;

namespace MiMiPC;

/**
   * need lib:
   * BouncyCastle.Crypto.dll（http://www.bouncycastle.org/csharp/index.html）

   * 用BC的注意点：
   * 这个版本的BC对SM3withSM2的结果为asn1格式的r和s，如果需要直接拼接的r||s需要自己转换。下面rsAsn1ToPlainByteArray、rsPlainByteArrayToAsn1就在干这事。
   * 这个版本的BC对SM2的结果为C1||C2||C3，据说为旧标准，新标准为C1||C3||C2，用新标准的需要自己转换。下面（被注释掉的）changeC1C2C3ToC1C3C2、changeC1C3C2ToC1C2C3就在干这事。java版的高版本有加上C1C3C2，csharp版没准以后也会加，但目前还没有，java版的目前可以初始化时“ SM2Engine sm2Engine = new SM2Engine(SM2Engine.Mode.C1C3C2);”。
   *
   * 按要求国密算法仅允许使用加密机，本demo国密算法仅供学习使用，请不要用于生产用途。
   */
public class GmUtil
{
    //private static readonly ILog log = LogManager.GetLogger(typeof(GmUtil));

    private static X9ECParameters x9ECParameters = GMNamedCurves.GetByName("sm2p256v1");

    private static ECDomainParameters ecDomainParameters =
        new ECDomainParameters(x9ECParameters.Curve, x9ECParameters.G, x9ECParameters.N);

    /**
     *
     * @param msg
     * @param userId
     * @param privateKey
     * @return r||s，直接拼接byte数组的rs
     */
    public static byte[] SignSm3WithSm2(byte[] msg, byte[] userId, AsymmetricKeyParameter privateKey)
    {
        return RsAsn1ToPlainByteArray(SignSm3WithSm2Asn1Rs(msg, userId, privateKey));
    }

    /**
      * @param msg
      * @param userId
      * @param privateKey
      * @return rs in <b>asn1 format</b>
      */
    public static byte[] SignSm3WithSm2Asn1Rs(byte[] msg, byte[] userId, AsymmetricKeyParameter privateKey)
    {
        try
        {
            ISigner signer = SignerUtilities.GetSigner("SM3withSM2");
            signer.Init(true, new ParametersWithID(privateKey, userId));
            signer.BlockUpdate(msg, 0, msg.Length);
            byte[] sig = signer.GenerateSignature();
            return sig;
        }
        catch (Exception e)
        {
            //log.Error("SignSm3WithSm2Asn1Rs error: " + e.Message, e);
            return null;
        }
    }

    /**
    *
    * @param msg
    * @param userId
    * @param rs r||s，直接拼接byte数组的rs
    * @param publicKey
    * @return
    */
    public static bool VerifySm3WithSm2(byte[] msg, byte[] userId, byte[] rs, AsymmetricKeyParameter publicKey)
    {
        if (rs == null || msg == null || userId == null) return false;
        if (rs.Length != RS_LEN * 2) return false;
        return VerifySm3WithSm2Asn1Rs(msg, userId, RsPlainByteArrayToAsn1(rs), publicKey);
    }

    /**
     *
     * @param msg
     * @param userId
     * @param rs in <b>asn1 format</b>
     * @param publicKey
     * @return
     */
    public static bool VerifySm3WithSm2Asn1Rs(byte[] msg, byte[] userId, byte[] sign, AsymmetricKeyParameter publicKey)
    {
        try
        {
            ISigner signer = SignerUtilities.GetSigner("SM3withSM2");
            signer.Init(false, new ParametersWithID(publicKey, userId));
            signer.BlockUpdate(msg, 0, msg.Length);
            return signer.VerifySignature(sign);
        }
        catch (Exception e)
        {
            //log.Error("VerifySm3WithSm2Asn1Rs error: " + e.Message, e);
            return false;
        }
    }

    /**
     * bc加解密使用旧标c1||c2||c3，此方法在加密后调用，将结果转化为c1||c3||c2
     * @param c1c2c3
     * @return
     */
    private static byte[] ChangeC1C2C3ToC1C3C2(byte[] c1c2c3)
    {
        int c1Len = (x9ECParameters.Curve.FieldSize + 7) / 8 * 2 + 1; //sm2p256v1的这个固定65。可看GMNamedCurves、ECCurve代码。
        const int c3Len = 32; //new SM3Digest().getDigestSize();
        byte[] result = new byte[c1c2c3.Length];
        Buffer.BlockCopy(c1c2c3, 0, result, 0, c1Len); //c1
        Buffer.BlockCopy(c1c2c3, c1c2c3.Length - c3Len, result, c1Len, c3Len); //c3
        Buffer.BlockCopy(c1c2c3, c1Len, result, c1Len + c3Len, c1c2c3.Length - c1Len - c3Len); //c2
        return result;
    }


    /**
     * bc加解密使用旧标c1||c3||c2，此方法在解密前调用，将密文转化为c1||c2||c3再去解密
     * @param c1c3c2
     * @return
     */
    private static byte[] ChangeC1C3C2ToC1C2C3(byte[] c1c3c2)
    {
        int c1Len = (x9ECParameters.Curve.FieldSize + 7) / 8 * 2 + 1; //sm2p256v1的这个固定65。可看GMNamedCurves、ECCurve代码。
        const int c3Len = 32; //new SM3Digest().GetDigestSize();
        byte[] result = new byte[c1c3c2.Length];
        Buffer.BlockCopy(c1c3c2, 0, result, 0, c1Len); //c1: 0->65
        Buffer.BlockCopy(c1c3c2, c1Len + c3Len, result, c1Len, c1c3c2.Length - c1Len - c3Len); //c2
        Buffer.BlockCopy(c1c3c2, c1Len, result, c1c3c2.Length - c3Len, c3Len); //c3
        return result;
    }

    /**
     * c1||c3||c2
     * @param data
     * @param key
     * @return
     */
    public static byte[] Sm2Decrypt(byte[] data, AsymmetricKeyParameter key)
    {
        return Sm2DecryptOld(ChangeC1C3C2ToC1C2C3(data), key);
    }

    /**
     * c1||c3||c2
     * @param data
     * @param key
     * @return
     */
    public static byte[] Sm2Encrypt(byte[] data, AsymmetricKeyParameter key)
    {
        return ChangeC1C2C3ToC1C3C2(Sm2EncryptOld(data, key));
    }

    /**
     * c1||c2||c3
     * @param data
     * @param key
     * @return
     */
    public static byte[] Sm2EncryptOld(byte[] data, AsymmetricKeyParameter pubkey)
    {
        try
        {
            SM2Engine sm2Engine = new SM2Engine();
            sm2Engine.Init(true, new ParametersWithRandom(pubkey, new SecureRandom()));
            return sm2Engine.ProcessBlock(data, 0, data.Length);
        }
        catch (Exception e)
        {
            //log.Error("Sm2EncryptOld error: " + e.Message, e);
            return null;
        }
    }

    /**
     * c1||c2||c3
     * @param data
     * @param key
     * @return
     */
    public static byte[] Sm2DecryptOld(byte[] data, AsymmetricKeyParameter key)
    {
        try
        {
            SM2Engine sm2Engine = new SM2Engine();
            sm2Engine.Init(false, key);
            return sm2Engine.ProcessBlock(data, 0, data.Length);
        }
        catch (Exception e)
        {
            //log.Error("Sm2DecryptOld error: " + e.Message, e);
            return null;
        }
    }

    /**
     * @param bytes
     * @return
     */
    public static byte[] Sm3(byte[] bytes)
    {
        try
        {
            SM3Digest digest = new SM3Digest();
            digest.BlockUpdate(bytes, 0, bytes.Length);
            byte[] result = DigestUtilities.DoFinal(digest);
            return result;
        }
        catch (Exception e)
        {
            //log.Error("Sm3 error: " + e.Message, e);
            return null;
        }
    }

    private const int RS_LEN = 32;

    private static byte[] BigIntToFixexLengthBytes(BigInteger rOrS)
    {
        // for sm2p256v1, n is 00fffffffeffffffffffffffffffffffff7203df6b21c6052b53bbf40939d54123,
        // r and s are the result of mod n, so they should be less than n and have length<=32
        byte[] rs = rOrS.ToByteArray();
        if (rs.Length == RS_LEN) return rs;
        else if (rs.Length == RS_LEN + 1 && rs[0] == 0) return Arrays.CopyOfRange(rs, 1, RS_LEN + 1);
        else if (rs.Length < RS_LEN)
        {
            byte[] result = new byte[RS_LEN];
            Arrays.Fill(result, (byte)0);
            Buffer.BlockCopy(rs, 0, result, RS_LEN - rs.Length, rs.Length);
            return result;
        }
        else
        {
            throw new ArgumentException("err rs: " + Hex.ToHexString(rs));
        }
    }

    /**
     * BC的SM3withSM2签名得到的结果的rs是asn1格式的，这个方法转化成直接拼接r||s
     * @param rsDer rs in asn1 format
     * @return sign result in plain byte array
     */
    private static byte[] RsAsn1ToPlainByteArray(byte[] rsDer)
    {
        Asn1Sequence seq = Asn1Sequence.GetInstance(rsDer);
        byte[] r = BigIntToFixexLengthBytes(DerInteger.GetInstance(seq[0]).Value);
        byte[] s = BigIntToFixexLengthBytes(DerInteger.GetInstance(seq[1]).Value);
        byte[] result = new byte[RS_LEN * 2];
        Buffer.BlockCopy(r, 0, result, 0, r.Length);
        Buffer.BlockCopy(s, 0, result, RS_LEN, s.Length);
        return result;
    }

    /**
     * BC的SM3withSM2验签需要的rs是asn1格式的，这个方法将直接拼接r||s的字节数组转化成asn1格式
     * @param sign in plain byte array
     * @return rs result in asn1 format
     */
    private static byte[] RsPlainByteArrayToAsn1(byte[] sign)
    {
        if (sign.Length != RS_LEN * 2) throw new ArgumentException("err rs. ");
        BigInteger r = new BigInteger(1, Arrays.CopyOfRange(sign, 0, RS_LEN));
        BigInteger s = new BigInteger(1, Arrays.CopyOfRange(sign, RS_LEN, RS_LEN * 2));
        Asn1EncodableVector v = new Asn1EncodableVector();
        v.Add(new DerInteger(r));
        v.Add(new DerInteger(s));
        try
        {
            return new DerSequence(v).GetEncoded("DER");
        }
        catch (IOException e)
        {
            //log.Error("RsPlainByteArrayToAsn1 error: " + e.Message, e);
            return null;
        }
    }

    public static AsymmetricCipherKeyPair GenerateKeyPair()
    {
        try
        {
            ECKeyPairGenerator kpGen = new ECKeyPairGenerator();
            kpGen.Init(new ECKeyGenerationParameters(ecDomainParameters, new SecureRandom()));
            return kpGen.GenerateKeyPair();
        }
        catch (Exception e)
        {
            //log.Error("generateKeyPair error: " + e.Message, e);
            return null;
        }
    }

    public static ECPrivateKeyParameters GetPrivatekeyFromD(BigInteger d)
    {
        return new ECPrivateKeyParameters(d, ecDomainParameters);
    }

    public static ECPublicKeyParameters GetPublickeyFromXY(BigInteger x, BigInteger y)
    {
        return new ECPublicKeyParameters(x9ECParameters.Curve.CreatePoint(x, y), ecDomainParameters);
    }

    public static AsymmetricKeyParameter GetPublickeyFromX509File(FileInfo file)
    {
        FileStream fileStream = null;
        try
        {
            //file.DirectoryName + "\\" + file.Name
            fileStream = new FileStream(file.FullName, FileMode.Open, FileAccess.Read);
            X509Certificate certificate = new X509CertificateParser().ReadCertificate(fileStream);
            return certificate.GetPublicKey();
        }
        catch (Exception e)
        {
            //log.Error(file.Name + "读取失败，异常：" + e);
        }
        finally
        {
            if (fileStream != null)
                fileStream.Close();
        }

        return null;
    }

    public class Sm2Cert
    {
        public AsymmetricKeyParameter privateKey;
        public AsymmetricKeyParameter publicKey;
        public String certId;
    }

    private static byte[] ToByteArray(int i)
    {
        byte[] byteArray = new byte[4];
        byteArray[0] = (byte)(i >> 24);
        byteArray[1] = (byte)((i & 0xFFFFFF) >> 16);
        byteArray[2] = (byte)((i & 0xFFFF) >> 8);
        byteArray[3] = (byte)(i & 0xFF);
        return byteArray;
    }

    /**
     * 字节数组拼接
     *
     * @param params
     * @return
     */
    private static byte[] Join(params byte[][] byteArrays)
    {
        List<byte> byteSource = new List<byte>();
        for (int i = 0; i < byteArrays.Length; i++)
        {
            byteSource.AddRange(byteArrays[i]);
        }

        byte[] data = byteSource.ToArray();
        return data;
    }

    /**
     * 密钥派生函数
     *
     * @param Z
     * @param klen
     *            生成klen字节数长度的密钥
     * @return
     */
    private static byte[] KDF(byte[] Z, int klen)
    {
        int ct = 1;
        int end = (int)Math.Ceiling(klen * 1.0 / 32);
        List<byte> byteSource = new List<byte>();
        try
        {
            for (int i = 1; i < end; i++)
            {
                byteSource.AddRange(GmUtil.Sm3(Join(Z, ToByteArray(ct))));
                ct++;
            }

            byte[] last = GmUtil.Sm3(Join(Z, ToByteArray(ct)));
            if (klen % 32 == 0)
            {
                byteSource.AddRange(last);
            }
            else
                byteSource.AddRange(Arrays.CopyOfRange(last, 0, klen % 32));

            return byteSource.ToArray();
        }
        catch (Exception e)
        {
            //log.Error("KDF error: " + e.Message, e);
        }

        return null;
    }

    public static byte[] Sm4DecryptCBC(byte[] keyBytes, byte[] cipher, byte[] iv, String algo)
    {
        if (keyBytes.Length != 16) throw new ArgumentException("err key length");
        if (cipher.Length % 16 != 0) throw new ArgumentException("err data length");

        try
        {
            KeyParameter key = ParameterUtilities.CreateKeyParameter("SM4", keyBytes);
            IBufferedCipher c = CipherUtilities.GetCipher(algo);
            if (iv == null) iv = ZeroIv(algo);
            c.Init(false, new ParametersWithIV(key, iv));
            return c.DoFinal(cipher);
        }
        catch (Exception e)
        {
            //log.Error("Sm4DecryptCBC error: " + e.Message, e);
            return null;
        }
    }


    public static byte[] Sm4EncryptCBC(byte[] keyBytes, byte[] plain, byte[] iv, String algo)
    {
        if (keyBytes.Length != 16) throw new ArgumentException("err key length");
        if (plain.Length % 16 != 0) throw new ArgumentException("err data length");

        try
        {
            KeyParameter key = ParameterUtilities.CreateKeyParameter("SM4", keyBytes);
            IBufferedCipher c = CipherUtilities.GetCipher(algo);
            if (iv == null) iv = ZeroIv(algo);
            c.Init(true, new ParametersWithIV(key, iv));
            return c.DoFinal(plain);
        }
        catch (Exception e)
        {
            //log.Error("Sm4EncryptCBC error: " + e.Message, e);
            return null;
        }
    }


    public static byte[] Sm4EncryptECB(byte[] keyBytes, byte[] plain, string algo)
    {
        if (keyBytes.Length != 16) throw new ArgumentException("err key length");
        if (plain.Length % 16 != 0) throw new ArgumentException("err data length");

        try
        {
            KeyParameter key = ParameterUtilities.CreateKeyParameter("SM4", keyBytes);
            IBufferedCipher c = CipherUtilities.GetCipher(algo);
            c.Init(true, key);
            return c.DoFinal(plain);
        }
        catch (Exception e)
        {
            //log.Error("Sm4EncryptECB error: " + e.Message, e);
            return null;
        }
    }

    public static byte[] Sm4DecryptECB(byte[] keyBytes, byte[] cipher, string algo)
    {
        if (keyBytes.Length != 16) throw new ArgumentException("err key length");
        if (cipher.Length % 16 != 0) throw new ArgumentException("err data length");

        try
        {
            KeyParameter key = ParameterUtilities.CreateKeyParameter("SM4", keyBytes);
            IBufferedCipher c = CipherUtilities.GetCipher(algo);
            c.Init(false, key);
            return c.DoFinal(cipher);
        }
        catch (Exception e)
        {
            //log.Error("Sm4DecryptECB error: " + e.Message, e);
            return null;
        }
    }

    public const String SM4_ECB_NOPADDING = "SM4/ECB/NoPadding";
    public const String SM4_CBC_NOPADDING = "SM4/CBC/NoPadding";
    public const String SM4_CBC_PKCS7PADDING = "SM4/CBC/PKCS7Padding";

    /**
     * cfca官网CSP沙箱导出的sm2文件
     * @param pem 二进制原文
     * @param pwd 密码
     * @return
     */
    public static Sm2Cert readSm2File(byte[] pem, String pwd)
    {
        Sm2Cert sm2Cert = new Sm2Cert();
        try
        {
            Asn1Sequence asn1Sequence = (Asn1Sequence)Asn1Object.FromByteArray(pem);
            //	    	ASN1Integer asn1Integer = (ASN1Integer) asn1Sequence.getObjectAt(0); //version=1
            Asn1Sequence priSeq = (Asn1Sequence)asn1Sequence[1]; //private key
            Asn1Sequence pubSeq = (Asn1Sequence)asn1Sequence[2]; //public key and x509 cert

            //	    	ASN1ObjectIdentifier sm2DataOid = (ASN1ObjectIdentifier) priSeq.getObjectAt(0);
            //	    	ASN1ObjectIdentifier sm4AlgOid = (ASN1ObjectIdentifier) priSeq.getObjectAt(1);
            Asn1OctetString priKeyAsn1 = (Asn1OctetString)priSeq[2];
            byte[] key = KDF(System.Text.Encoding.UTF8.GetBytes(pwd), 32);
            byte[] priKeyD = Sm4DecryptCBC(Arrays.CopyOfRange(key, 16, 32),
                priKeyAsn1.GetOctets(),
                Arrays.CopyOfRange(key, 0, 16), SM4_CBC_PKCS7PADDING);
            sm2Cert.privateKey = GetPrivatekeyFromD(new BigInteger(1, priKeyD));
            //	    	log.Info(Hex.toHexString(priKeyD));

            //	    	ASN1ObjectIdentifier sm2DataOidPub = (ASN1ObjectIdentifier) pubSeq.getObjectAt(0);
            Asn1OctetString pubKeyX509 = (Asn1OctetString)pubSeq[1];
            X509Certificate x509 = (X509Certificate)new X509CertificateParser().ReadCertificate(pubKeyX509.GetOctets());
            sm2Cert.publicKey = x509.GetPublicKey();
            sm2Cert.certId = x509.SerialNumber.ToString(10); //这里转10进账，有啥其他进制要求的自己改改
            return sm2Cert;
        }
        catch (Exception e)
        {
            //log.Error("readSm2File error: " + e.Message, e);
            return null;
        }
    }

    /**
     *
     * @param cert
     * @return
     */
    public static Sm2Cert ReadSm2X509Cert(byte[] cert)
    {
        Sm2Cert sm2Cert = new Sm2Cert();
        try
        {
            X509Certificate x509 = new X509CertificateParser().ReadCertificate(cert);
            sm2Cert.publicKey = x509.GetPublicKey();
            sm2Cert.certId = x509.SerialNumber.ToString(10); //这里转10进账，有啥其他进制要求的自己改改
            return sm2Cert;
        }
        catch (Exception e)
        {
            //log.Error("ReadSm2X509Cert error: " + e.Message, e);
            return null;
        }
    }

    public static byte[] ZeroIv(String algo)
    {
        try
        {
            IBufferedCipher cipher = CipherUtilities.GetCipher(algo);
            int blockSize = cipher.GetBlockSize();
            byte[] iv = new byte[blockSize];
            Arrays.Fill(iv, (byte)0);
            return iv;
        }
        catch (Exception e)
        {
            //log.Error("ZeroIv error: " + e.Message, e);
            return null;
        }
    }

    public static void Main2(string[] s)
    {
        // 随便看看
        //log.Info("GMNamedCurves: ");
        foreach (string e in GMNamedCurves.Names)
        {
            //log.Info(e);
        }
        //log.Info("sm2p256v1 n:" + x9ECParameters.N);
        //log.Info("sm2p256v1 nHex:" + Hex.ToHexString(x9ECParameters.N.ToByteArray()));

        // 生成公私钥对 ---------------------
        AsymmetricCipherKeyPair kp = GmUtil.GenerateKeyPair();
        //log.Info("private key d: " + ((ECPrivateKeyParameters)kp.Private).D);
        //log.Info("public key q:" + ((ECPublicKeyParameters)kp.Public).Q); //{x, y, zs...}

        //签名验签
        byte[] msg = System.Text.Encoding.UTF8.GetBytes("message digest");
        byte[] userId = System.Text.Encoding.UTF8.GetBytes("userId");
        byte[] sig = SignSm3WithSm2(msg, userId, kp.Private);
        //log.Info("testSignSm3WithSm2: " + Hex.ToHexString(sig));
        //log.Info("testVerifySm3WithSm2: " + VerifySm3WithSm2(msg, userId, sig, kp.Public));

        // 由d生成私钥 ---------------------
        BigInteger d = new BigInteger("097b5230ef27c7df0fa768289d13ad4e8a96266f0fcb8de40d5942af4293a54a", 16);
        ECPrivateKeyParameters bcecPrivateKey = GetPrivatekeyFromD(d);
        //log.Info("testGetFromD: " + bcecPrivateKey.D.ToString(16));

        //公钥X坐标PublicKeyXHex: 59cf9940ea0809a97b1cbffbb3e9d96d0fe842c1335418280bfc51dd4e08a5d4
        //公钥Y坐标PublicKeyYHex: 9a7f77c578644050e09a9adc4245d1e6eba97554bc8ffd4fe15a78f37f891ff8
        AsymmetricKeyParameter publicKey = GetPublickeyFromX509File(new FileInfo("d:/certs/69629141652.cer"));
        //log.Info(publicKey);
        AsymmetricKeyParameter publicKey1 =
            GetPublickeyFromXY(new BigInteger("59cf9940ea0809a97b1cbffbb3e9d96d0fe842c1335418280bfc51dd4e08a5d4", 16),
                new BigInteger("9a7f77c578644050e09a9adc4245d1e6eba97554bc8ffd4fe15a78f37f891ff8", 16));
        //log.Info("testReadFromX509File: " + ((ECPublicKeyParameters)publicKey).Q);
        //log.Info("testGetFromXY: " + ((ECPublicKeyParameters)publicKey1).Q);
        //log.Info("testPubKey: " + publicKey.Equals(publicKey1));
        //log.Info("testPubKey: " + ((ECPublicKeyParameters)publicKey).Q.Equals(((ECPublicKeyParameters)publicKey1).Q));

        // sm2 encrypt and decrypt test ---------------------
        AsymmetricCipherKeyPair kp2 = GenerateKeyPair();
        AsymmetricKeyParameter publicKey2 = kp2.Public;
        AsymmetricKeyParameter privateKey2 = kp2.Private;
        byte[] bs = Sm2Encrypt(System.Text.Encoding.UTF8.GetBytes("s"), publicKey2);
        //log.Info("testSm2Enc dec: " + Hex.ToHexString(bs));
        bs = Sm2Decrypt(bs, privateKey2);
        //log.Info("testSm2Enc dec: " + System.Text.Encoding.UTF8.GetString(bs));

        // sm4 encrypt and decrypt test ---------------------
        //0123456789abcdeffedcba9876543210 + 0123456789abcdeffedcba9876543210 -> 681edf34d206965e86b3e94f536e4246
        byte[] plain =
            Hex.Decode(
                "0123456789abcdeffedcba98765432100123456789abcdeffedcba98765432100123456789abcdeffedcba9876543210");
        byte[] key = Hex.Decode("0123456789abcdeffedcba9876543210");
        byte[] cipher = Hex.Decode("595298c7c6fd271f0402f804c33d3f66");
        bs = Sm4EncryptECB(key, plain, GmUtil.SM4_ECB_NOPADDING);
        //log.Info("testSm4EncEcb: " + Hex.ToHexString(bs)); ;
        bs = Sm4DecryptECB(key, bs, GmUtil.SM4_ECB_NOPADDING);
        //log.Info("testSm4DecEcb: " + Hex.ToHexString(bs));

        //读.sm2文件
        String sm2 =
            "MIIDHQIBATBHBgoqgRzPVQYBBAIBBgcqgRzPVQFoBDDW5/I9kZhObxXE9Vh1CzHdZhIhxn+3byBU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\nVfY6";
        bs = Convert.FromBase64String(sm2);
        String pwd = "cfca1234";
        GmUtil.Sm2Cert sm2Cert = GmUtil.readSm2File(bs, pwd);
        //log.Info("testReadSm2File, pubkey: " + ((ECPublicKeyParameters)sm2Cert.publicKey).Q.ToString());
        //log.Info("testReadSm2File, prikey: " + Hex.ToHexString(((ECPrivateKeyParameters)sm2Cert.privateKey).D.ToByteArray()));
        //log.Info("testReadSm2File, certId: " + sm2Cert.certId);

        bs = Sm2Encrypt(System.Text.Encoding.UTF8.GetBytes("s"), ((ECPublicKeyParameters)sm2Cert.publicKey));
        //log.Info("testSm2Enc dec: " + Hex.ToHexString(bs));
        bs = Sm2Decrypt(bs, ((ECPrivateKeyParameters)sm2Cert.privateKey));
        //log.Info("testSm2Enc dec: " + System.Text.Encoding.UTF8.GetString(bs));

        msg = System.Text.Encoding.UTF8.GetBytes("message digest");
        userId = System.Text.Encoding.UTF8.GetBytes("userId");
        sig = SignSm3WithSm2(msg, userId, ((ECPrivateKeyParameters)sm2Cert.privateKey));
        //log.Info("testSignSm3WithSm2: " + Hex.ToHexString(sig));
        //log.Info("testVerifySm3WithSm2: " + VerifySm3WithSm2(msg, userId, sig, ((ECPublicKeyParameters)sm2Cert.publicKey)));
    }
}